Treadle for sewing-machines



(No Model.) H. GRAMER.

TREADLE FOR SEWING MACHINES, &0. No. 271,426. Patented Jan.30,1883.

WITNESSES l INVBNTOR ATTORNEYS.

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NITED STATES PATENT OFFICE.

HERMAN ORAll/IER, OF SONORA, CALIFORNIA.

TREADLE FOR SEWING-MACHINES, 80c.

SPECIFICATION formingpart of Letters Patent No. 271,426, dated January 30, 1883.

Application filed May 25, 1882. (No model.) 7

To all whom it may concern:

'Be it known that I, HERMAN CRAMER, of Sonora, in the county of Tuolumne and State of California, have invented a new and Improved Sewing-Machine Treadle; and I do hereby declare that the following is a full,- clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to improvements in the bearings of sewing-machine treadles; and it has for its object to provide means, first, to keep the treadle-bearings rigidly in line and at a fixed distance apart to avoid friction, and, second, to make its movement in use noiseless.

To this end my invention consists in the construction and combination of parts hereinafter fully described and claimed, reference being bad to the accompanying drawings, in which- Figure 1 is a perspective view of a portion of a sewing-machine, showing my invention. Fig. 2 is a transverse vertical section through one bearing of the treadle.

A represents the treadle, provided with the usual pitman-connection by which to run the sewing-machine wheel.

B represents the two trunnions, cast as a portion of the treadle and extending from its sides into loop-holes in the common cast-iron cross-brace, 0. These trunnions are sharpened to an edge or corner along their lower sides, and the lower end of the loop hole is hollowed to an angle more obtuse than the edge of the trunnion, to serve as a bearing for the same and permit the rocking motion common to treadles.

0 represents the usual cast-iron double brace connecting the two end legs diagonally in a plane generally vertical. The lower ends of this brace are secured directly to the web of the legs by bolts (1, and for convenience and strength I make the two ends of the common cross-bar, D, serve as these bolts. The upper ends of the brace are secured, as usual, either to the web of the legs or to the table of the machine, near the legs.

The treadle and its trunnion-bearings are wholly independent of the cross-bar D, except its service, as stated, to hold the brace to the legs. The bearingholes in the brace are formed into. long vertical loops to permit the entrance of the treadle.

hearing, to prevent the noise which would re- 4 suit were the trunnions permitted to bounce and thump cndwise, when the. treadle is in motion. The leather F is fitted to the curve of the upper side of the trunnion, which is an arc of a cylinder whose center of oscillation is the lower edge of the trunnion. The same leather also interposes between the end of the trunnion and the adjacent iron. f is ablock serving as a mere hacker, to which the cushion F is attached. This block conforms to the back and top side of the cushion and fills the loop-hole in the brace above the trunnion. It also has tangs or projections e, resting in suitable recesses in the brace O, which are held between the brace and the web of the leg E, by Whiclrmeans the block and cushion are held in place.

Below the bearings of the trunnions B, I provide cups M, attached to the ends of brace U, to catch the oil that usually drips from such bearings. By this construction my treadlebearings are rigidly fixed, and in no way liable to get out of line or to require adjustment. The-usual noise is prevented and overflowing oil is caught before it can do damage.

I am aware that sewing-machine treadles have before been provided with \l-shaped bearings, and I do not claim the same as my invention; but

What I claim, and wish to secure by Letters Patent, is-

. 1. The vertical double brace joining the legs of the two ends of a sewing-machine, provided with holes through its lower extremities to serve as bearings, in combination with a treadle provided with trunnions fitted to oscillate in said bearings, substantially as specified.

2. The sewing-machine legs E, the vertical double brace G, secured thereto and provided with holes to serve as bearings for the treadle A, and the treadle provided with trunnions B to oscillate in said bearings, in combination with the cushion F and the blockf, as and for the purpose specified.

HERMAN QRAMER.

Witnesses:

FRANK W. STREET, CHARLES L. STREET. 

